What is the token for this new password confirmation reg. form element?

The RSS entry referenced in this thread says that it is available, but doesn't specify the actual token. Nor is it listed in the token reference list within the module (I have already updated to version 48.02.09). I've tried all the variations I could think of (password_confirm, password_verify, confirm_password, verify_password, password_confirmation, password_verification, etc.) and haven't guessed it yet.